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參數資料
| 型號： | AD7856AR |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | ADC |
| 英文描述： | 5 V Single Supply, 8-Channel 14-Bit 285 kSPS Sampling ADC |
| 中文描述： | 8-CH 14-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO24 |
| 封裝： | SOIC-24 |
| 文件頁數： | 4/32頁 |
| 文件大小： | 294K |
| 代理商： | AD7856AR |
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AD7856
TIMING SPECIFICATIONS
1
(V
DD
= 5 V; T
A
= T
MIN
to T
MAX
, unless otherwise noted. A Grade: f
CLKIN
= 6 MHz; K Grade: f
CLKIN
= 4 MHz.)
–4–
REV. A
Limit at T
MIN
, T
MAX
A Version
Parameter
f
CLKIN2
K Version
Units
Description
500
6
6
100
50
3.5
–0.4 t
SCLK
±
0.4 t
SCLK
30
30
45
30
20
0.4 t
SCLK
0.4 t
SCLK
30
30/0.4 t
SCLK
50
90
50
2.5 t
CLKIN
2.5 t
CLKIN
41.7
500
4
4
100
50
5.25
–0.4 t
SCLK
±
0.4 t
SCLK
50
50
75
40
20
0.4 t
SCLK
0.4 t
SCLK
30
30/0.4 t
SCLK
50
90
50
2.5 t
CLKIN
2.5 t
CLKIN
62.5
kHz min
MHz max
MHz max
ns min
ns max
μ
s max
ns min
ns min/max
ns max
ns max
ns max
ns min
ns min
ns min
ns min
ns min
ns min/max
ns max
ns max
ns max
ns max
ns max
ms typ
Master Clock Frequency
f
SCLK
t
13
t
2
t
CONVERT
t
3
CONVST
Pulsewidth
CONVST
↓
to BUSY
↑
Propagation Delay
Conversion Time = 20 t
CLKIN
SYNC
↓
to SCLK
↓
Setup Time (Noncontinuous SCLK Input)
SYNC
↓
to SCLK
↓
Setup Time (Continuous SCLK Input)
Delay from
SYNC
↓
Until DOUT 3-State Disabled
Delay from
SYNC
↓
Until DIN 3-State Disabled
Data Access Time After SCLK
↓
Data Setup Time Prior to SCLK
↑
Data Valid to SCLK Hold Time
SCLK High Pulsewidth
SCLK Low Pulsewidth
SCLK
↑
to
SYNC
↑
Hold Time (Noncontinuous SCLK)
(Continuous SCLK)
Delay from
SYNC
↑
Until DOUT 3-State Enabled
Delay from
SCLK
↑
to DIN Being Configured as Output
Delay from
SCLK
↑
to DIN Being Configured as Input
CAL
↑
to BUSY
↑
Delay
CONVST
↓
to BUSY
↑
Delay in Calibration Sequence
Full Self-Calibration Time, Master Clock Dependent
(250026 t
CLKIN
)
Internal DAC Plus System Full-Scale Cal Time, Master
Clock Dependent (222228 t
CLKIN
)
System Offset Calibration Time, Master Clock Dependent
(27798 t
CLKIN
)
t
44
t
54
t
64
t
7
t
8
t
9
t
10
t
11
t
125
t
t
13
t
15
t
16
t
CAL
t
CAL1
37.04
55.5
ms typ
t
CAL2
4.63
6.94
ms typ
NOTES
1
Sample tested at +25
°
C to ensure compliance. All input signals are specified with tr = tf = 5 ns (10% to 90% of V
DD
) and timed from a voltage level of 1.6 V.
See Table X and timing diagrams for different interface modes and calibration.
2
Mark/Space ratio for the master clock input is 40/60 to 60/40.
3
The
CONVST
pulsewidth here only applies for normal operation. When the part is in power-down mode, a different
CONVST
pulsewidth will apply
(see Power-Down section).
4
Measured with the load circuit of Figure 1 and defined as the time required for the output to cross 0.8 V or 2.4 V.
5
t
is derived form the measured time taken by the data outputs to change 0.5 V when loaded with the circuit of Figure 1. The measured number is then extrapolated
back to remove the effects of charging or discharging the 100 pF capacitor. This means that the time, t
12
, quoted in the timing characteristics is the true bus
relinquish time of the part and is independent of the bus loading.
6
t
is derived form the measured time taken by the data outputs to change 0.5 V when loaded with the circuit of Figure 1. The measured number is then
extrapolated back to remove the effects of charging or discharging the 100 pF capacitor. This means that the time, t
, quoted in the Timing Characteristics is the
true delay of the part in turning off the output drivers and configuring the DIN line as an input. Once this time has elapsed the user can drive the DIN line
knowing that a bus conflict will not occur.
Specifications subject to change without notice.
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相關代理商/技術參數 |
參數描述 |
|---|---|
| AD7856AR-REEL | 功能描述:IC ADC 14BIT 8CH 5V 24-SOIC RoHS:否 類別:集成電路 (IC) >> 數據采集 - 模數轉換器 系列:- 標準包裝:1,000 系列:- 位數:12 采樣率（每秒）:300k 數據接口:并聯(lián) 轉換器數目:1 功率耗散（最大）:75mW 電壓電源:單電源 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:24-SOIC（0.295"，7.50mm 寬） 供應商設備封裝:24-SOIC 包裝:帶卷 (TR) 輸入數目和類型:1 個單端，單極；1 個單端，雙極 |
| AD7856AR-REEL7 | 制造商:Analog Devices 功能描述:ADC Single SAR 285ksps 14-bit Serial 24-Pin SOIC W T/R 制造商:Rochester Electronics LLC 功能描述:8 CH. 14-BIT 300 KSPS ADC I.C. - Tape and Reel |
| AD7856ARS | 制造商:Analog Devices 功能描述:ADC Single SAR 285ksps 14-bit Serial 24-Pin SSOP |
| AD7856ARS-REEL | 制造商:Analog Devices 功能描述:ADC Single SAR 285ksps 14-bit Serial 24-Pin SSOP T/R |
| AD7856ARS-REEL7 | 制造商:Analog Devices 功能描述:ADC Single SAR 285ksps 14-bit Serial 24-Pin SSOP T/R |
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